An opened Calendar
Often, events are to be exchanged with other persons. And to call everybody to organize it is a time consuming. Send invitations by email to an event and follow them directly from the event, share a calendar, publish it are features which answer to these needs. In reverse, to view a calendar published by a friend or on Internet (in Ical format) can be viewed within the same calendar At last, our calendar on line is also opened in term of access : it can be accessed from any web browser or through a Caldav client on his smartphone.